.ig \"-*- nroff -*-
Copyright (C) 1989-1995 Free Software Foundation, Inc.

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.TH AFMTODIT @MAN1EXT@ "@MDATE@" "Groff Version @VERSION@"
.SH NAME
afmtodit \- create font files for use with groff \-Tps
.SH SYNOPSIS
.B afmtodit
[
.B \-ns
]
[
.BI \-d desc_file
]
[
.BI \-e enc_file
]
[
.BI \-i n
]
[
.BI \-a n
]
.I afm_file
.I map_file
.I font
.SH DESCRIPTION
.B afmtodit
creates a font file for use with groff and
.BR grops .
.B afmtodit
is written in perl;
you must have perl version 3 installed in order to run
.BR afmtodit .
.I afm_file
is the AFM (Adobe Font Metric) file for the font.
.I map_file
is a file that says which groff character names map onto
each PostScript character name;
this file should contain a sequence of lines of the form
.IP
.I
ps_char groff_char
.LP
where
.I ps_char
is the PostScript name of the character
and
.I groff_char
is the groff name of the character (as used in the groff font file.)
The same
.I ps_char
can occur multiple times in the file;
each
.I groff_char
must occur at most once.
.I font
is the groff name of the font.
If a PostScript character is in the encoding to be used for the font
but is not mentioned in
.I map_file
then
.B afmtodit
will put it in the groff font file as an unnamed character,
which can be accessed by the
.B \eN
escape sequence in
.BR troff .
The groff font file will be output to a file called
.IR font .
.LP
If there is a downloadable font file for the font, it may be listed in
the file
.BR @FONTDIR@/devps/download ;
see
.BR grops (@MAN1EXT@).
.LP
If the
.B \-i
option is used,
.B afmtodit
will automatically generate an italic correction,
a left italic correction and a subscript correction
for each character
(the significance of these parameters is explained in
.BR groff_font (@MAN5EXT@));
these parameters may be specified for individual characters by
adding to the
.I afm_file
lines of the form:
.IP
.BI italicCorrection\  ps_char\ n
.br
.BI leftItalicCorrection\  ps_char\ n
.br
.BI subscriptCorrection\  ps_char\ n
.LP
where
.I ps_char
is the PostScript name of the character,
and
.I n
is the desired value of the corresponding parameter in thousandths of an em.
These parameters are normally needed only for italic (or oblique) fonts.
.SH OPTIONS
.TP
.B \-n
Don't output a
.B ligatures
command for this font.
Use this with constant-width fonts.
.TP
.B \-s
The font is special.
The effect of this option is to add the
.B special
command to the font file.
.TP
.BI \-d desc_file
The device description file is
.I desc_file
rather than the default
.BR DESC .
.TP
.BI \-e enc_file
The PostScript font should be reencoded to use the encoding described
in enc_file.
The format of
.I enc_file
is described in
.BR grops (@MAN1EXT@).
.TP
.BI \-a n
Use
.I n
as the slant parameter in the font file;
this is used by groff in the positioning of accents.
By default
.B afmtodit
uses the negative of the ItalicAngle specified in the afm file;
with true italic fonts it is sometimes desirable to use
a slant that is less than this.
If you find that characters from an italic font have accents
placed too far to the right over them,
then use the
.B \-a
option to give the font a smaller slant.
.TP
.BI \-i n
Generate an italic correction for each character so that 
the character's width plus the character's italic correction
is equal to
.I n
thousandths of an em
plus the amount by which the right edge of the character's bounding
is to the right of the character's origin.
If this would result in a negative italic correction, use a zero
italic correction instead.
.IP
Also generate a subscript correction equal to the 
product of the tangent of the slant of the font and
four fifths of the x-height of the font.
If this would result in a subscript correction greater than the italic
correction, use a subscript correction equal to the italic correction
instead.
.IP
Also generate a left italic correction for each character
equal to
.I n
thousandths of an em
plus the amount by which the left edge of the character's bounding box
is to the left of the character's origin.
The left italic correction may be negative.
.IP
This option is normally needed only with italic (or oblique) fonts.
The font files distributed with groff were created using an option of
.B \-i50
for italic fonts.
.SH FILES
.Tp \w'\fB@FONTDIR@/devps/download'u+2n
.B @FONTDIR@/devps/DESC
Device description file.
.TP
.BI @FONTDIR@/devps/ F
Font description file for font
.IR F .
.TP
.B @FONTDIR@/devps/download
List of downloadable fonts.
.TP
.B @FONTDIR@/devps/text.enc
Encoding used for text fonts.
.TP
.B @FONTDIR@/devps/generate/textmap
Standard mapping.
.SH "SEE ALSO"
.BR groff (@MAN1EXT@),
.BR grops (@MAN1EXT@),
.BR groff_font (@MAN5EXT@),
.BR perl (1)
